There is a slight risk of contracting genital herpes or HPV (genital warts) from DATY. That said, covered in-n-out is a higher risk than DATY or BBBJ. I have read this in countless medical articles. Also, when I went to college about 15 years ago, at orientation we had to go to some sex education thing. They had a gay frat boy who contracted AIDS talk to us, and then they had some educators with placards labelled with activities. They asked people in the audience to have risky behavior sorted from left to right. Again, DATY and BBBJ are less risky than covered in-n-out. I went to a top 10 school, so it wasn't some community college clowns that were making this up. This is a FACT.
Keep in mind, unless you have a tiny wee wee, that condom doesn't cover it all. The base of your wee wee will come in contact with the labia, or more. Also, condoms break or slip off. Shit happens.
I personally do uncovered DATY, but I don't penetrate. I stick to the lips and the love button. Women get more out of DATY in these areas anyway. I have not contracted any STDs yet. You have a much greater chance of contracting something by sticking it in the kitty, even if it's covered.
If a provider looks kind of skanky, and has lots of those white patches of skin from wart removal, I don't DATY, and I never repeat. Like a sushi chef, you need to inspect her gadget before you do anything. Unfortunately, herpes can spread even when sores are not evident. But again, you have a much greater chance of getting that with the ol' in-out, even with a raincoat... Saliva is a very powerful anti-infectious agent, so make sure you slobber all over her... and if you get a BBBJ, ask for it extra wet... (the way it should be, anyway!)
The best thing you can do is to bring some wet wipes and wash your wang after each pop. Also, if you do DATY, wash your lips. I usually pop a few Listerine pocket packs for good measure.
But yeah... If you're afraid of DATY, you probably shouldn't do anything at all... Stay home and jerk it, that's the safest. You'll save a lot of money too.
DATY and BBBJ are hyped in terms of risk. This is done by prude pro-abstience organizations, because they abhor the idea of oral activities... This is similar to the war on drugs, were entities like Partnership for an Unfree America have been known to lie about drugs, especially cannabis. We have a lot of prudes in this country, who want everyone to be prudes too. Then they get busted in some sleezy hotel, and cry and say "I have sinned, please forgive me", and go on to make even more money off stupid people... But I digress...
In many of the legit places in Nevada, the providers allow uncovered DATY and do BBBJ. That said, they also overcharge greatly.
Statistically speaking, DATY and BBBJ are safer than covered in-n-out. You're always taking a risk as a hobbiest, so don't fool yourself into thinking that not doing DATY or getting BBBJ's means you are safe...
Even if you stuck your bare willy in her kitty, and she had something, you still have a certain probability of catching something. Most people who catch STDs are with their partner, and doing it 5 times a day, and then passing out at night, without washing up. Just like the Valtrex commercial says, 70% of people caught it from their partner. If you're with a provider maybe once a month, and pop twice in and hour and wash up, you're not at as huge of a risk.
As you can see, I once really wondered about this, and was on the fence. I really took stock and did my homework, and this is how I feel. Many will disagree with me. That's fine. I'll stick with statistics and science, and leave the church-prude-pro-abstinence exaggerations to those who believe them...